Investigation of maximum distance reach for spectrally efficient combined WDM systems

Bobrovs, Vjačeslavs; Udaļcovs, Aleksejs; Trifonovs, Iļja

doi:10.1109/bcfic.2012.6217979

Cited by 4 publications

(6 citation statements)

References 5 publications

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“…75 GHz) is used for channel separation as it was revealed by the authors in [1,11]. So, the use of unequal channel spacing for channel separation in mixed WDM systems increases the utilization of frequency band as the result the SE for the first investigated system increased up to 42 % but for the second -up to 6 percentages.…”

Section: Resultsmentioning

confidence: 91%

“…In both cases the minimum channel spacing value for each of these systems is equal to 75 GHz but estimated spectral efficiency is: 0.27 bit/s/Hz for systems where only in three channels the optical signals are transmitted with 40 Gbit/s per channel bitrate, while in the remaining six it is equal to 40 Gbit/s; 0.40 bit/s/Hz for systems where in six channels the optical signals are transmitted with 40 Gbit/s, and only in three channels -with 10 Gbit/s. Frequency plan that ensures the maximum possible spectral efficiency was studied for the worst system from each group that have a higher average BER values comparing with the remaining system's configurations as it was detected in [11]. So, in this research frequency plan applying the unequal channel intervals were drown for the following configurations of As it can be calculated using Fig.…”

Section: Resultsmentioning

confidence: 98%

“…Based on this configuration [1 st , 4 th and 7 th channel: NRZ-OOK, B= 10 or 40 Gbit/s] -[2 nd , 5 th and 8 th channel: 2-POLSK, B= 10 or 40 Gbit/s] -[3 rd , 6 th and 9 th channel: NRZ-DPSK, B= 10 or 40 Gbit/s] six different WDM system with mixed per channel bitrate can be formed. Previously in [1,11] these systems were divided into two groups for the minimum and equal channel spacing detection. In both cases the minimum channel spacing value for each of these systems is equal to 75 GHz but estimated spectral efficiency is: 0.27 bit/s/Hz for systems where only in three channels the optical signals are transmitted with 40 Gbit/s per channel bitrate, while in the remaining six it is equal to 40 Gbit/s; 0.40 bit/s/Hz for systems where in six channels the optical signals are transmitted with 40 Gbit/s, and only in three channels -with 10 Gbit/s.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of spectrally efficient transmission for unequally channel spaced WDM systems with mixed data rates and signal formats

Udaļcovs

Bobrovs

2012

2012 8th International Symposium on Communication Systems, Networks &Amp; Digital Signal Processing (CSNDSP)

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The authors have investigated the frequency plan of channels central wavelengths allotment for wavelength division multiplexing (WDM) systems with the mixed data rates and optical signal formats. Such mixed-WDM fiberoptic transmission system (FOTS) is offered as a model for the designing of a next generation of backbone optical networks. Since the necessity for transmission of different signal formats (even with mixed per channel bitrates) over single optical fiber may arise in the nearest future as a result of telecom networks infrastructure development effort which goal is a larger systems carrying capacity (data throughput). These frequency plans were drawn applying unequal frequency intervals which values were found using the principle of intermediate value applied for channel spacings defined in ITU -T Recommendation G.694.1. The obtained more accurate frequency grid of channel central wavelength allows increase the utilization of transmission band and spectral efficiency. It is found that the improvement in transmission spectral efficiency of investigated mixed WDM system highly depends on its initial configuration -i.e. equal channel spacing value that is used for channel separation and the number of channel with the higher per channel bitrate (i.e. 40 Gbit/s) comparing with bitrate in the remaining channels (i.e. 10 Gbit/s). In general, it is revealed that for some of investigated mixed-WDM systems the transmission spectral efficiency can be increased up to 42 percent by applying proposed flexed frequency grid for channel central wavelengths.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

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Investigation of spectrally efficient transmission for unequally channel spaced WDM systems with mixed data rates and signal formats

Udaļcovs

Bobrovs

2012

2012 8th International Symposium on Communication Systems, Networks &Amp; Digital Signal Processing (CSNDSP)

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“…Nowadays, the expansion and variety of new broadband services along with their rapid advance increase the demands of users for internet traffic. Consequently, internet service providers (ISPs) need to introduce new technologies for increasing the capacity of existing transmission system [1]. Furthermore, the advancing of access network plays an important role in providing internet traffic available for consumers.…”

Section: Introductionmentioning

confidence: 99%

“…The one of the most intensively studied solutions of rising the total transmission capacity of WDM system is the increase of its spectral efficiency (SE) [1], [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Influence of Mixed Configurations on Performance of WDM-PON

Kurbatska¹,

Alsevska²,

Gegere³

et al. 2017

ElAEE

Self Cite

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This paper aims at assessing of implementation of the concept of mixed systems in wavelength-divisionmultiplexing passive optical networks (WDM-PONs). At the first stage, the authors evaluate performance of two equalchannel transmission systems with non-return-to-zero (NRZ) and duobinary (DB) coding in terms of Q-factor, minimal channel spacing and supported data rate. At the second stage, two configurations of mixed transmission systems are proposed. The system with unequal channel spacing and multiple modulation formats (MMFs) as well as the system with mixed line rates (MLRs) and MMFs are investigated. The obtained results reveal that the impact of implementation of both systems is positive and concept of mixed transmission system can be considered as a potential solution for the increase of spectral efficiency (SE) of WDM-PON transmission system.

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Chip‐Scale Dispersion Compensation of High‐Speed Data – Recent Progress and Future Perspectives

Chen,

Ong,

Tan

2024

Laser & Photonics Reviews

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High‐speed data movement in data center communications and telecommunications is the cornerstone of society's connectivity. It serves as a critical driver of economic activity, social networks, and education. Complementary metal‐oxide semiconductor compatible silicon‐based photonic integrated circuits have proliferated transceiver technology, owing to their ease of integration with application‐specific integrated circuits and mass manufacturability. Fiber impairments in the transmission of high‐speed data stem from both optical attenuation and optical dispersion. As data rates scale and modulation formats advance, the impact of fiber dispersion even at shorter reaches becomes more important to address. In this review article, recent advancements made in integrated, chip‐scale dispersion compensation solutions are covered. The focus on chip‐scale devices stems from their ability to be easily integrated within the transmitter or receiver chip of transceivers. Future perspectives on how these devices may become commonplace within transceivers and their potential impact are discussed.

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Investigation of maximum distance reach for spectrally efficient combined WDM systems

Cited by 4 publications

References 5 publications

Investigation of spectrally efficient transmission for unequally channel spaced WDM systems with mixed data rates and signal formats

Investigation of spectrally efficient transmission for unequally channel spaced WDM systems with mixed data rates and signal formats

Investigation of Influence of Mixed Configurations on Performance of WDM-PON

Chip‐Scale Dispersion Compensation of High‐Speed Data – Recent Progress and Future Perspectives

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